Upgrade Fusion

When you have a Fusion-based search application running, at some point it might be necessary to upgrade to a later version of Fusion. Beginning with Fusion 3.1, we provide a migrator tool to simplify the upgrade process.

Tip

See the release history to find out what’s new, including which versions of Solr, Spark, and ZooKeeper are bundled with each Fusion release.

The migrator transfers over most of the objects that make up your search application, all configurations and customizations for your application, and all data in collections in the application.

Note

In some cases, manual steps are required for objects that the migrator can’t handle automatically. We give you instructions and guidance about what might be required. You should also review the log of the upgrade in /opt/fusion/x.y.z/var/upgrade/tmp/migrator.log (on Unix) or C:\lucidworks\var\fusion\x.y.z\upgrade\tmp\migrator.log (on Windows). The x.y.z directory is for the Fusion version that you are migrating from.

Key points

Following are some key points about upgrading Fusion:

Migration involves down time – The upgrade process involves multiple starts and stops of Fusion services. Please plan accordingly, especially in terms of disabling external load balancers or monitors that might react adversely to the starts and stops.

Current deployment is preserved – Upgrades preserve the current Fusion deployment, copying information over from the current deployment to the new one. This provides a rapid roll-back option if you encounter problems during the upgrade process.